Grease-cup.



JAM

G. J. BUSHMEYER.

GREASE 0UP.

APPLIOATION FILED AUG. 24, 1908.

926,923. Patented July 6, 1909.

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CHARLES J. BUSHMEYER, OF PURGELL, OKLAHOMA.

GREASE-CUP.

Specification of Letters Patent.

Patented July 6, 1909.

Application filed August 24, 1908. Serial No. 450,075.

To all whom it may concern:

Be it known that I, CHARLES J. Busin MEYER, a citizen of the United States, and a resident oi Purcell, in the county of McClain and State of Oklahoma, have invented a new and useful Grease-Cup, of which the following is a specification.

My invention relates to improvements in receptacles for still and heavy lubricating materials, and the object of this improvement is tdprovide means to prevent the ad justable plungers from working out of such receptacles and getting lost.

Grease cups, so called, are usually made in the form of a cylinder with one end closed and the interior screw-threaded so a plug may be screwed down into the body in order to force the thick lubricating material out through an opening in the bottom. This opening may be at any desired point but is usually in the center. A properly threaded projection extending from the bottom provides means for attaching the grease cup in the desired position. .lhe trembling and pounding of machinery, especially when this apparatus is used on locomotives, has a tendency to unscrew the plug, which is often lost. To prevent this, I have devised means, adapted to be carried by this plug, to engage the threaded inner surface of the receptacle in such a manner as to prevent the plug from unscrewing, because of the trembling and shaking or the machinery, while at the same time permitting the plug to turn into the bore and also allowing its withdrawal so that the receptacle may be refilled.

In the accompanying drawing. Figures 1 and 2 are plans of a grease cup with the looking means for the plug in different positions. Fig. 3 is an elevation of the cup. Fig. 4 a cross section of the upper portion of the same on the line A A of Fig. 1. Figs. 5 and e are details, on a larger scale than the other figures.

Similar reference characters refer to like parts throughout the several views.

The body 1 of the lubricator receptacle is in the form of a cylinder having its bore screw-threaded to receive the plug 2, and is provided with the enlarged hexagonal portion 3 and the threaded projection 4, all well known to mechanical engineers and forming no part of my invention. The rectangular depression 5 is adapted to receive the square end of a wrench or any other device, by which the plug may be turned. After the cup has been filled with lubricating compound, which. is usually in the form of a paste, the plug is turned down, thereby forcing the lubricating compound through the opening in the bottom and the extension 4 onto the revolving portion of the machine.

It has been a source of great annoyance that this plug 2 very often unscrews and is lost. To prevent this loss a small hole 6 is drilled into the same, the slot 7 is cut across until it just communicates with the opening 5, and the slot is formed communicating with the hole 6 but is of less width than the diameter of the hole 6. A round stem 8 provided with a tongue 9 is introduced as shown in Fig. 4, the slot 10 admitting the tongue 9. A spring 11 is then pushed in, the ends of which extend into the opening 5 as shown in Figs. 1 and 2. The slot 7 is so positioned that the split and bent end 13 of the tongue will engage one of the threads of the receptacle as shown in Fig. 5. The stem 8 has a groove 14 as shown in Fig. 6 to receive the spring.

hen the plug is to be withdrawn so that the cup may be refilled, the stem is turned to the position shown in Fig. 2, disengaging the end 13 of the tongue 9 from the threaded interior surface of the receptacle. The plug may now be unscrewed, the stem 8 being held in this position by the spring 11, the cup refilled and the plug screwed in again until the proper pressure is put upon the grease. The stem 8 is then turned to the position shown in Fig. 1 when the sharp ends of the tongue 9 will engage the threaded surface of the cup, under the action of the spring pressing against the corner 15 as shown in Fig. 1, any tendency of the plug to unscrew being resisted by the tongue digging into the shell. It will be evident that the plug can be screwed into the cup without resistence from this lock. It is of course to be understood that while this grease cup is especially designed for locomotives and this lock is especially adapted to hold the plugs of this type of lubricator from turning backward, this invention is not limited to the use of this look for lubricators, as it is adapted to r Having now explained my improvements, 7

what I claim as my invention and desire to secure by Letters Patent 1s:

1. In a lubricator, the combination of a shell having its interior screw-threaded, a plug adapted to be screwed into said shell and provided with a hole and a slot, a stem mounted in said hole and provided with a tongue adapted to swing in said slot, and a spring mounted in said slot adapted to hold the end of said tongue in contact With the threaded bore of the shell or out of such contact as desired.

2. A new article of manufacture comprisin g a screw threaded member having a transverse slot and a here at right angles to said slot, a stem mounted in the bore, and a spring and a tongue mounted in the slot, the tongue being attached to the stem so it may be swung thereby, and the spring being so mounted as to tend to hold the end of the tongue projecting beyond "the outer surface of the screw threaded member.

In testimony whereof, I have signed this specification in the presence of two subscribing Witnesses.

CHARLES J. BUSHMEYER.

l/Vitnesses:

Louis Gnoo'rnousn, T. V. CLEAVER. 

